Normality? I want that

[Prompt] Write a story that revolved around a kind, compassionate character and then make them evil in the last sentence

Living in the slums was enough to make anybody lose all traces of humanity at times. Aside from Carl’s living conditions, his father was one that could not survive without his regular doses of drugs now and his mother… his once kind and beautiful mother was but an empty shell he could no longer recognize. Bruises and cuts adorned her features. They say his father was a potential boxer until he suddenly had a losing streak. First it was alcoholism then he resorted to drugs that he would inject in his system every few days. Carl couldn’t even remember the time his father was ever sober and a time when his mother wasn’t beaten to a pulp. This didn’t stop him from wanting to study though.

At times he would escape to visit his grandmother that lived not too far from the school he was studying in. Despite her hatred for his father, she cared for Carl at least and felt great dismay for her daughter. There in that house, Carl would hear stories of what normality was. How his mom was when she was normal and he was taught how kids his age would normally act. 

At school, Carl was the ideal student, good grades, helps his classmates and was even active in a club but at home, he wished nothing more than to experience the normal his grandmother would tell him about. 

One afternoon, while Carl was walking home, a group of ambulances was at their house. He heard that his father had died of overdose. He could only show the people how blank his expression was and the people did decide to leave him alone because of that. And thus started his life alone with his mother. They were far more peaceful in his point of view and he had earnestly hoped that his mother would eventually show any expressions on her otherwise blank face. But then one day, as they were having their meal together, she simply stood, went out the door then left. 

It was pretty normal for such things to happen, after all and even after three days passing, Carl still hoped that his mother would return. He mostly visited his neighbors that were his classmates to help with homework and such to keep himself distracted but to no avail, he would at times still cry over having been abandoned by his mother. Even the mother of the other kids would wonder why such a kind kid would have to suffer at such a young age, especially when he’s been helping their kids out as much as the child could. 

It had been nearly a week since the disappearance of his mother and news seemed to reach his school, and ultimately his grandmother. Unfortunately his grandmother wanted him to live in an orphanage seeing as she would not have enough time to raise him given her age. Carl said nothing and simply went to the kitchen to get something and naturally his grandmother simply followed. That was her mistake. “I wanted to live normally, mami. I thought killing that b@st@rd of a dad would work but no! And now you want to take me to the orphanage? You deserve to die next!” The next thing that came on the news was of an old lady that had died of overdose and was said to be affiliated with the first overdose case. 

You know how what seems normal for you may not be normal for other people? He was jealous of other people's normal yet what was normal for him now was the violence.